Impala Llama ApplicationMaster Health Tests

Impala Llama ApplicationMaster File Descriptors

This Impala Llama ApplicationMaster health test checks that the number of file descriptors used does not rise above some percentage of the Impala Llama ApplicationMaster file descriptor
limit. A failure of this health test may indicate a bug in either Hadoop or Cloudera Manager. Contact Cloudera support. This test can be configured using the File Descriptor
Monitoring Thresholds Impala Llama ApplicationMaster monitoring setting.

Short Name: File Descriptors

Property Name

Description

Template Name

Default Value

Unit

File Descriptor Monitoring Thresholds

The health test thresholds of the number of file descriptors used. Specified as a percentage of file descriptor
limit.

The health test thresholds for monitoring of free space on the filesystem that contains this role's heap dump
directory.

heap_dump_directory_free_space_absolute_thresholds

critical:5.36870912E9, warning:1.073741824E10

BYTES

Heap Dump Directory Free Space Monitoring Percentage Thresholds

The health test thresholds for monitoring of free space on the filesystem that contains this role's heap dump
directory. Specified as a percentage of the capacity on that filesystem. This setting is not used if a Heap Dump Directory Free Space Monitoring Absolute Thresholds setting is configured.

heap_dump_directory_free_space_percentage_thresholds

critical:never, warning:never

PERCENT

Impala Llama ApplicationMaster Host Health

This Impala Llama ApplicationMaster health test factors in the health of the host upon which the Impala Llama ApplicationMaster is running. A failure of this test means that the host
running the Impala Llama ApplicationMaster is experiencing some problem. See that host's status page for more details.This test can be enabled or disabled using the Impala Llama
ApplicationMaster Host Health Test Impala Llama ApplicationMaster monitoring setting.

The health test thresholds for monitoring of free space on the filesystem that contains this role's log
directory.

log_directory_free_space_absolute_thresholds

critical:5.36870912E9, warning:1.073741824E10

BYTES

Log Directory Free Space Monitoring Percentage Thresholds

The health test thresholds for monitoring of free space on the filesystem that contains this role's log directory.
Specified as a percentage of the capacity on that filesystem. This setting is not used if a Log Directory Free Space Monitoring Absolute Thresholds setting is configured.

log_directory_free_space_percentage_thresholds

critical:never, warning:never

PERCENT

Impala Llama ApplicationMaster Process Status

This Impala Llama ApplicationMaster health test checks that the Cloudera Manager Agent on the Impala Llama ApplicationMaster host is heart beating correctly and that the process
associated with the Impala Llama ApplicationMaster role is in the state expected by Cloudera Manager. A failure of this health test may indicate a problem with the Impala Llama ApplicationMaster
process, a lack of connectivity to the Cloudera Manager Agent on the Impala Llama ApplicationMaster host, or a problem with the Cloudera Manager Agent. This test can fail either because the Impala
Llama ApplicationMaster has crashed or because the Impala Llama ApplicationMaster will not start or stop in a timely fashion. Check the Impala Llama ApplicationMaster logs for more details. If the
test fails because of problems communicating with the Cloudera Manager Agent on the Impala Llama ApplicationMaster host, check the status of the Cloudera Manager Agent by running /etc/init.d/cloudera-scm-agent status on the Impala Llama ApplicationMaster host, or look in the Cloudera Manager Agent logs on the Impala Llama ApplicationMaster host for more
details. This test can be enabled or disabled using the Impala Llama ApplicationMaster Process Health Test Impala Llama ApplicationMaster monitoring setting.

Short Name: Process Status

Property Name

Description

Template Name

Default Value

Unit

Impala Llama ApplicationMaster Process Health Test

Enables the health test that the Impala Llama ApplicationMaster's process state is consistent with the role
configuration

llama_scm_health_enabled

true

no unit

Impala Llama ApplicationMaster Swap Memory Usage

This Impala Llama ApplicationMaster health test checks the amount of swap memory in use by the role. A failure of this health test may indicate that your machine is overloaded. This test
can be configured using the Process Swap Memory Thresholds monitoring settings.

Short Name: Swap Memory Usage

Property Name

Description

Template Name

Default Value

Unit

Process Swap Memory Thresholds

The health test thresholds on the swap memory usage of the process.

process_swap_memory_thresholds

critical:never, warning:any

BYTES

Impala Llama ApplicationMaster Unexpected Exits

This Impala Llama ApplicationMaster health test checks that the Impala Llama ApplicationMaster has not recently exited unexpectedly. The test returns "Bad" health if the number of
unexpected exits exceeds a critical threshold. For example, if this test is configured with a critical threshold of 1, this test returns "Good" health if there have been no unexpected exits recently.
If 1 or more unexpected exits occured recently, this test returns "Bad" health. The test also indicates whether any of the exits were caused by an OutOfMemory error if the Cloudera Manager
Kill When Out of Memory monitoring setting is enabled. This test can be configured using the Unexpected Exits Thresholds and Unexpected Exits Monitoring Period Impala Llama ApplicationMaster monitoring settings.

Short Name: Unexpected Exits

Property Name

Description

Template Name

Default Value

Unit

Unexpected Exits Monitoring Period

The period to review when computing unexpected exits.

unexpected_exits_window

5

MINUTES

Unexpected Exits Thresholds

The health test thresholds for unexpected exits encountered within a recent period specified by the
unexpected_exits_window configuration for the role.

If this documentation includes code, including but not limited to, code examples, Cloudera makes this available to you under the terms of the Apache License, Version 2.0, including any required
notices. A copy of the Apache License Version 2.0 can be found here.